The Rudest collections person I've ever engaged with!

Just got off the phone with a lady called Thembisa, Her supervisors name is Shaun Mtwana, Now I understand that you work in collections and you have a tough job collecting outstanding money , BUT THERE IS ABSOLUTELY NO REASON FOR YOU TO BE RUDE! not only were you unprofessional, I'm not your friend, I am a client you are absolutely not fit to speak to to customers!. I don't know who cleared your training , But you are speaking to a human not a dog! you need to watch how you speak to clients, don't talk over them , answer them when they ask you a question at the end of the day I'm taking time out of My day to answer your call the least you can do is have respect!